mirror of
https://github.com/OpenMP/Examples.git
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37 lines
826 B
C
37 lines
826 B
C
/*
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* @@name: target_data.3
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* @@type: C
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* @@operation: compile
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* @@expect: success
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* @@version: omp_4.0
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*/
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#include <math.h>
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#define COLS 100
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void gramSchmidt(float Q[][COLS], const int rows)
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{
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int cols = COLS;
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#pragma omp target data map(Q[0:rows][0:cols])
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for(int k=0; k < cols; k++)
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{
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double tmp = 0.0;
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#pragma omp target map(tofrom: tmp)
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#pragma omp parallel for reduction(+:tmp)
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for(int i=0; i < rows; i++)
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tmp += (Q[i][k] * Q[i][k]);
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tmp = 1/sqrt(tmp);
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#pragma omp target
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#pragma omp parallel for
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for(int i=0; i < rows; i++)
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Q[i][k] *= tmp;
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}
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}
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/* Note: The variable tmp is now mapped with tofrom, for correct
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execution with 4.5 (and pre-4.5) compliant compilers.
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See Devices Intro.
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*/
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